Grinder



July 9, 1946. w a L N 2,403,775

GRINDER File d De 20, 1944 Inventor wsu-Rw aw. Lsow Patented July 9, 1946 V panama-5 GRINDER Wllfrid'G. Wilson,-'Fort William, Ontario, Canada Application December 20, 1944, Serial No. 569,048

This invention relates to certain novel and useful improvements characterizing what is believed to be ahighly; useful and practicable grinder which is especially; but notnecessarily, adapted for usein the making of templates and dieswhich vary in thickness. v a

More specifically, the grinder with "which we are herein concerned is designed .to eliminate long and costly hand'flling, this due to thefact thatthe present machine, because ofits particular design andfunctionalfachievements makes it possible to do better what was heretofore done tediously and slowly bylway of the customary hand filing technique. v Briefly, 'the preferred embodiment of the invention comprises a base .plate adapted to receive' the work, a perpendicular post'rising'there from, a motor equipped arm and adapter bracket means for properlymounting same on the post, andanadjustable arm also on'the post above the grinder, this having appliances to accommodate the pattern to be followed in grinding operations.

Novelty is thought to reside in a collar which is adjustable on the post, the inner adjacent portion of the grinder arm coacting therewith, the arm itself being swung back and forth like a human arm and being provided with a motorized grinding tool'and suitable maneuvering and manipulating handles.

j 40min (c1. 51-100) venientlyreferred to as a post 9. 1 A collar I is mounted on the post and provided with binding lugs vI l rendered eilective by clamping means l2. I The numeral 13 designates a motor, that is an electric motor,- of any suitable style and type, on the outer end of the horizontal swinging-arm IL. "Ihe'motor is provided with a concentric grindin tool [5 andon diametrically opposite sides with claw-like handles I 6, these to permit proper handling and maneuveringof thetool IS. The arm I6 is connected to a hinging and adjusting ring I1 which in turn is connected by arule 'joint I 8 to the arm l4. Thus, the desired swinging, adjusting and hinging action for the motorized tool is provide V [Referring further to the swingable arm and tool assembly, it willbe noted that this is flat on to p to' accommodate a. channel-shaped clip is which serves to accommodate a. shiftable block 20 held in place by a set-screw 2| and carryinga feeler wheel 22 sometimes also referred to in the art as a tracer.

I next call attention to the horizontal arm 23 having a collar 24 at its inner end with clamping 25 lugs 25 and clamping means 26 whereby to permeans on the outer end thereof.

Novelty is' also predicated upon the adoption and use of a feeler or tracer element carried by the swingable am, this being arranged to cooperate with special adapter means which clamps and holds in place the pattern or so-called layout template.

Other features and advantage will become more readily apparent from the following description and the accompanying illustrative drawing.

In the drawing, wherein like numerals are employed to designate like parts throughout the views, the single figure is a perspective view of a. grinder constructed in accordance with th principles of the present invention. j

Referring now to the drawing by distinguishing reference numerals, it will be seen that the. base,

' which is of appropriate configuration, is denoted by the numerali. This is provided with suitable supporting legs, marginally arranged, is approximately 14"x20" in length and is provided with a, flat area 6 which supports the work (not shown). This region 6 is provided with spaced longitudinal slots l. Attached to and rising from the socket 8 is an upright which may be conmit the arm to be adjusted up and down and in a horizontal plane to properly locate the adapter The adapter means comprises a slide 21 held in place by a set screw 28 said slide having a depending portion with a horizontal slotted frame 29. This frame serves to accommodate the pattern or layout template (not shown), that is the part which is to be traced by the feeler'wheel 22. Retaining elements 30 held in place by wing nuts 3| I employ to securely mount the pattern.

As before stated, the machine is designed to eliminate long and costly hand filing. The template used is a lay-out template; of sheetmetal. The'grinder is used for making templates and dies which vary in thickness. This lay-out template has always been made for jobs by hand.

The use of the novel machine for accomplishing the results is a step forward in the art.

The work, which is to be ground, is first sawed on a Do-all" saw to within of finished lines and is then finished on my improved grinder. The work is fastened in the slots and the grinder arm is lowered so that the tool can operate properly. The grinder tool arm is held in place by the stop collar I0 and correct shape is given to the work on the base by a lay-out template held in place by the wing nuts 3|, the different contours being followed by the feeler wheel or tracer. The grinder arm and tool is swung similar to a cient to clarify the construction of the invention as hereinafter claimed.

Minor changes in shape, size, materials and:

rearrangements of parts may be resorted to inactual practice so long as no departure is made from the invention as claimed.

I claim:

1. A grinder of the class described comprising a base, a post attached to and rising vertically from 'said base, a stop collar adjustable on said post, an arm provided with a ring surrounding the post and coop'erable with the stop collar, a motor on the outer end of the arm, and a tool carried by said motor, the arm being attached to said ring by way of a rule joint, said motor being provided with diametrically opposite clawlike handles and being provided on its top with a clip, a block slidable in said clip, and a feeler wheel mountedon said block. a

2. A grinder of the class described comprising a base, a'pos't attached to and risingvertically from said base, a stop collar adjustable on said post, an arm provided with a ring at its inner end surrounding the post and cooper'able with the stop collar, a motor on the outer end of said arm, a tool carried by said motor, said arm being attached to said ring by way of a rule joint, handles mounted on diametrically opposite sides of said motor, and a feeler wheel slidably and ad justably mounted on said motor.

3. A grinder of the class described comprising a base, a post attached to and rising vertically from said base, a stop collar adjustable on said post, an arm provided with a ring at its inner end surrounding the post and cooperable with the stop collar, a motor on the outer end of said arm, a tool carried by said motor, said arm being attached to said ring by way of a rule joint, handles mounted on diametrically opposite sides of said motor, afeeler wheel slidably and adjustably mounted on said motor, a second arm adjustably mounted on said post above the first-named arm, said second arm being provided on its outer and with adapter means, said adapter means being constructed to accommodate a pattern to be traced, 'sai'd adaptermeans including a bracket and said bracket being slotted and provided with Wing nut equipped clamping elements for a layout template.

4. A grinder of the class described comprising 'a'b'ase, said base embodying an upstanding plate having a marginal depending flange, said plate being provided' with a plurality oi parallel spaced slots, a vertical post attached to and rising from said base, a horizontal a'rm adjacentfthe upper end of said post swingably and adjustably mounted on saidpost, said arm being provided at its outer end with ari'adju'St'ame bracket and Said bracket, being slotted and provided with wing nut equipped clamping elements for a lay-out template, a stop collar adjustable on said post, a second arm provided with a ring surrounding the post and cooperabl with the stop (501181, a motor on the outer end of the arm, a tool carried by said motor, said latter arm being attached to said ring by wayor a rule joint, said motor being pro- Vided with iametrically opposite handles, and a fel'er wheel mounted on the ibia of the motor beneath said slotted oraekt arid above Said handle's. v a

WILFREDG. WILSON. 

